2. 职称英语
  3. This region ______as the costliest place to do business.A、often is referredB、is

This region ______as the costliest place to do business.A、often is referredB、is

游客2025-06-18  35
问题 This region ______as the costliest place to do business.
选项 A、often is referred
B、is often referred
C、is referred often to
D、is often referred to
答案 D
解析 Adverbs of indefinite frequency can appear between the auxiliary and the main verb. Choices (A), (B), and (C) are not appropriate positions for indefinite frequency adverbs.  
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